Author
R.P. Kennedy
Bio: R.P. Kennedy is an academic researcher. The author has contributed to research in topics: Ozone layer & Volcano. The author has an hindex of 1, co-authored 1 publications receiving 324 citations.
Topics: Ozone layer, Volcano, Latitude, Explosive eruption, Stratosphere
Papers
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TL;DR: In this paper, the effects of a hard impact on a concrete barrier wall are discussed. But this paper only deals with the effect of "hard" missile impact and does not deal with the impact on "soft" barrier walls.
358 citations
TL;DR: In this paper , the authors present a systematic evaluation of the perturbation to the stratosphere from an explosive volcanic eruption injecting sulfur dioxide into the atmosphere, as a function of latitude, season, and injection gas halogen content in a chemistry-climate state representative of the present day.
Abstract: Abstract We present a systematic evaluation of the perturbation to the stratosphere from an explosive volcanic eruption injecting sulfur dioxide into the atmosphere, as a function of latitude, season, and injection gas halogen content in a chemistry-climate state representative of the present day (modeled as year 2025). Enhancements in aerosol surface area density and decreases in stratospheric ozone are observed for a period of years following all modeled scenarios, with volcanic eruptions near the equator impacting both hemispheres relatively equally, and eruptions at higher latitudes reducing the thickness of the ozone layer more substantially in the hemisphere of the eruption. Our simulations reveal that there that are significant seasonal differences when comparing the stratospheric impact of a volcanic eruption occurring in summer versus winter, and this holds true regardless of whether volcanic halogen gases (Cl, Br) are co-injected with sulfur dioxide. If an explosive halogen-rich eruption were to occur, there would be substantial ozone losses in both hemispheres, regardless of latitude or season, with recovery potentially exceeding 4 years.
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TL;DR: In this paper, the effects of loading rate, hydrostatic pressure and microstructural heterogeneity on the load-carrying capacities of concrete and mortar were investigated using split Hopkinson pressure bar and plate impact.
604 citations
TL;DR: In this paper, a review of recent research into the penetration and perforation of plates and cylinders by free-flying projectiles travelling at sub-ordnance velocities is presented.
447 citations
TL;DR: In this paper, a collection of empirical formulae to predict the penetration depth, scabbing thickness and perforation thickness is presented in both Imperial and SI units and the current status of various design codes is summarized based on a dimensional analysis, dominant non-dimensional parameters that may influence the local impact effects on concrete targets are obtained and then used to present some of the test data Various nose shape factors are compared and a unique definition of the nose shape factor is suggested Analytical models and numerical simulation methods for penetration are summarized Criticisms are made for the current understanding of
411 citations
TL;DR: An overview of the mechanism, the causes, the consequences, and the preventive strategies associated with BLEVEs is presented.
273 citations
TL;DR: Based on the dimensional analysis of concrete penetration by a non-deformable projectile and an analytical penetration model, two dimensionless numbers, i.e., the impact function I and the geometry function of projectile N are defined and used in a dimensionless formula to predict the penetration depth.
259 citations